Roller mill



(No- Model.) 2 Sheets-Sheet .1.

'N. W. BOLT. ROLLER MILL.

I No.255,859. i PatehtedAprQLlazp .jfon z lays.

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M (No Model.) 2 sheetssheen 2.

N. W. HULT.

l ROLLER MILL. No. 255.859. Patented Apr. 4,1882.

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NITED STATES PATENT amc-a.,

NOAH lV. HOLT, OF BUFFALO, NEW YORK.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 255,859, dated April 4, 1882.

i i.Application filed January 1.1, 1882. (No model.)

To all whom it may concewt:

Be it known that l, NOAH W. HOLT, ofthe city'of Buffalo, in the county of Erie, in the State ot' New York, have invented new and useful Improvements in Roller-Mills, ot' which the following is a specification.

This invention relates to that class of rollermills which' are employed for the reduction ot' grain and similar substances; and it has for its object to render such mills more convenient andeft'ectivein their operation.

My invention consists of the mechanism whereby the rollers are adjusted, as hereinafter fully set forth.

ln' the accompanying drawings, consisting of two sheets, Figure l represents a side ele'- vation, partly in section, of a roller-mill provided with myimprovemcnts. Fig.2 isalongitudinal section, on an enlarged scale, of the mechanism whereby the movable roller is adjusted. Fig. 8 is a verticalcross-section in Fig. 4 is an end view of the roller-millwith the lower part of the frame broken away. Fig. 5 is a top plan view of one end of the rollermill. Fig. 6 is a top plan view of one of the eccentrics and connecting parts whereby the movable roller is adj usted.'

'Like letters ot' reference refer to like parts in the several figures.

A represents the stationary frame of the roller-mill 5 B, the adjustable rollers, provided with journals`b,which turn in journal-boxes O. D represents the stationary rollers, provided Y with journals c', turning in journal-boxes O.

by avertie-al bolt,`f, which is arrangedcentrally i under A the journal-box, 'and which passes `upwardly through the frame A and taps into'the of the journal-box.isprovided with around depression, f4, into which projects the Vinner rounded end ot' a horizontal screwbolt, f5,

`which passes through a threaded hole in the base-piece F. The bolt f5 and projection f3 are arranged on the same .horizontal plane. Upon loosening the bolts fand f5 the basepiece F is permitted to turn in a horizontal plane on the vertical boltf as a pivot, andthe journal-box C is permitted to rock in a vertical plane on the horizontal boltf and projection f3 as a pivot, thereby giving thejournalbox an adjustment in the manner of a universal joint,`and enabling the journal-box to adjust itself to the position ot' the journal.

The rocking movement of the journal-box isA limited bythe walls of the recess f in the base-piece F, which sustain the journal-box approximately in its proper position when the boitfI is loosened, but permit of the requisite slight adjustment ofthe box. When the bolts have been so loosened the roller is placed-,with its journals in thev boxes O', when the latter will adjust themselves to the position of the journals and support the same without bind-4 ing. By tightening the bolts fand f5 the journal-boxes G' are readily secured in this position.

F represents the supportingarm in which the bearing C of the adjustable roller is mounted, and which extends downward through an opening in the horizontal topilange, a', ofthe frame A, and is attached at its lower end to the frameAby a horizontal bolt, g. This bolt is provided with an eccentric neck or shank, y', outside of its threaded portion g2, which latter is tapped into thc frame A, and. a jam-nut,

g3, is applied to the outer threaded portion of the bolt g, so as to bear against the outer side of the frame A. The supporting-arm F' turns on tite eccentric neel( g'of the bolt, and is raised or lowered at desire by releasing the jam-nut and turning the bolt in one or the other direction, thereby raising or lowering the roller accordingly'. and the 'parts are secured in the desired position by again tighteningthejain-nut. The supporting-arm F' is provided at its top with a recess, j", in which the journalbox is n1ounted,`by a projection, f3, depressions f2 and f4, and a screw-bolt, f5, constructed and arranged like the corresponding parts of the base-piece F and journal-box U, hereinbefore mentioned.

h represents the horizontal adjusting-bolts whereby the arms F' and the movable rollers B connected therewith are moved toward and from the 4"stationary rollers D. Each bolt la passes through a sleeve, H, which is provided on its under ride with a lug, H', which surrounds an eceentlic, i. The inner end of each bolt h is provided with a screw-thread which works in a threaded hole.formed in the outer end of the connection j. Thelatter is attached to the Lipper end of the arm F' by bit'urcated bearings j', formed on. the arm F'7 and a horizontal pivot, jz, whereby the connection j'is end against a screw-nut, 7c', which is appliedl connected to the benringj'.

7c represents a spiral spring which surrounds the parts h, j, and j', and which bears with one end against the arm F', and with the opposite to the inner threaded end ot' the sleeve H, whereby the tension of the spring k can be regulated.

L represents a bevel-wheel secured tothe outer end of each bolt h, and L' represents two bevel-pinions gearing into the wheels L and mounted on a transverse shaft, l, which is supported at its endsin bearings l', formed on thc sleeves` H.

L2 is a hand-wheel whereby the shaft Z can be turned.

'm represents a horizontal transverse shaft, connecting the two eccentrics i, located in the two sleeves H of the same adjustable roller. The shaft m is supported in bearings m', secured to the stationary frame A. The two shafts -m on opposite ends ot' the machine are each provided with an npwardly-projecting arm, m2, and both arms m2 are connected by rods m3 with a lever, M, which is pivoted centrally between the rods m3 to the casing E3.

fn n' represent two projecting stops secured to the side ofthe casing E3, whereby the sweep of the lever M is limited.

By turning the bolts h in one or the other direction the arms F' are swung on the bolts g, so as to move the roller B toward or from the stationary roller D. The rotation of the bolts h is etl'ected simultaneously by means of 'the shaft l and gear-wheels L L', whereby the movable roller is retained parallel with the sta tionary roller in its movement toward and from the stationary roller. One ofthe bevelwheels,

( L',is attached to the shaft l by a setscrew, Z3, or

an equivalent device, which permits the wheel to be loosened when the movable roller is pressed against the stationary roller, thereby permitting the parts to adjust themselves to the position of the rollers when in contact with each other. Theloose wheel is then tightened, whereby the parallelism of the two rollers is secured. By turning the shaft min one or the other direction the eceentrics t', mounted thereon, cause the sleeves H to swing the arms F' toward or from the stationary roller without affecting or altering the position of the adjusting mechanism. Both shafts, m, being con-v nected by the arms m2, rods m3, and lever M, the two movable rollers are swung away from the stationary rollers or toward the same simultaneously. By this means the movable rollers can be separated from the stationary rollers when necessary-as, for instance, in starting the machinewithout affecting the adjustment of the rollers,as the stops n n' are so arranged as to permit of this movement ot' the rollers and to determine theproperpositionof the movable rollers by the contact of the lever M with said stops.' When the rollers are in their proper working'position the lever M will lie against the stop a, as represented in Fig. l, and when the rollers clear each other the lever M willlie against the stop n'.

I do not in this application desire to claim the construction of the feed-hopper, as it forms the subject of another application.

'I claim as'my inventon- 1. The combination, with the frame A and journal-boxes C', having each a projection, f3, and socket f4, of base pieces F, supporting` said boxes, and provided with a socket, f2, and horizontal boltf5, and a vertical pivot-bolt,f, whereby each base-piece F is attached to the frame A, substantially as set forth.

2. The combination, with the frame A and journal-boxes C', cach provided on its under side with a transverse rib, of base-pieces F, each provided with a transverse recess, f', in which the rib of thejournal-box plays, and whereby the playof thejournal-boxis limited, and a projectiomf, and boltf, constituting horizontal pivots on which the journal-box can rock,y substantially as set forth.

IOO

lIO

3. The combination, with the rollers B D and journal-boxes C C', provided each with a projection, f3, and a recess,f4, ot' supporting basepieces provided each with a recess,f2, and screw-boltf5, substantially as set forth.

4. The combination, with the movable roller B and its journal-boxes, of the pivoted supporting-arms F', adjusting-bolts 7L, sleeves H, in which the bolts h are supported, and mech anism whereby the sleeves H are simultaneously moved toward or from the stationary roller, substantially as set forth.

5. The combination, with the movable roller B and itsjourual-boxes, ofthe pivoted supporting-arms F', adjusting-bolts h, and mechanism whereby the same are simultaneously adjusted, sleeves H, in which the bolts h are supported,

and mechanism whereby the sleeves H are simultaneously moved toward or from the stationary roller, substantially as set forth.

` 6. The combination, with the movable roller B and itsjourn :1l-boxes, of the pivoted supporting-arms F', adjusting-bolts h, sleeves H, in

which the bolts h are supported, eceentrics i,

and shaft-m, and mechanism whereby the move- @meut ofthe eecentrios is limited7 substantially 1o as set forth.

7. The combination, with the movable roller B and itsjournal-boxes, ofthe pivoted supporting-arms F', adjusting-bolts h, sleeves H, in which the bolts h are supported, mechanism 15 whereby the sleeves Hare moved simultaneously, gear-Wheels L, secured to the bolts 7L, shaft l, supported on the sleeve H, and gear-wheels L', substantially as set forth.

A8. The combinatiomwith the movable rollers B B and their journalboxes, ot the pivoted supporting-arms F', adjusting-bolts h, sleeves H, in which the bolts h are supported, eccentrics i, shafts m, arms m2, rods m3, lever M, and stops n n', substantially as set forth.

9. The combination, with the stationary roller-beariugs C C and movable roller-bearings C C, of the springs 7c and adjusting-screws h, whereby the movable roller-bearings are adjusted, sleeves H, eccentrcs d, whereby the sleevesH are moved toward and from the stationary roller-bearings, and mechanism whereby both accent-ries are connected and turned simultaneously, substantially as set forth.

NoAH W. HoLT.

Witnesses:

JNO. J. BONNER, CHAs. J. BUCHHEIT. 

